Dateien hochladen nach „input“

data input (by user):

-geometrical data balloon
-mass properties
-thermo-optical properties
-start date, time and location

input/natural_constants.py

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+g = 9.81        # local gravitational acceleration in [m/s^2]
+R_air = 287.1   # Specific Gas Constant Dry Air in [J/(kg * K)]
+R_gas = 2077.1  # Specific Gas Constant Helium in [J/(kg * K)]
+R_E = 6378000   # Earth Radius in [m]
+e = 0.016708    # Eccentricity of Earth's Orbit
+sigma = 5.670374419 * 10 ** -8  # Stefan-Boltzmann-Constant
+gamma = 1.4

input/user_input.py

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+# BALLOON
+m_pl = 10.0  # payload mass in [kg]
+m_film = 1.0  # mass balloon film in [kg]
+m_gas = 1.7645  # 1.60391061452  # lifting gas mass in [kg]
+V_max = 9999999  # maximum fillable balloon volume in [m^3]
+
+# THERMO-OPTICAL
+alpha_VIS = 0.024
+r_VIS = 0.06
+tau_VIS = 0.916
+epsilon = 0.1
+alpha_IR = 0.1
+tau_IR = 0.86
+r_IR = 0.04
+
+c_f = 2092  # [J/(kg*K)]
+
+epsilon_ground = 0.9
+Albedo = 0.2
+T_ground = 273.15
+
+# DRAG
+c_d = 0.47       # drag coefficient balloon (spherical) [-]
+
+c_virt = 0
+
+# SIMULATION
+t_end = 10000                          # maximum simulation time in [s]
+dt = 0.1                              # simulation time step in [s]
+start_height = 0.0                     # start altitude in [m]
+start_lat = 0.0                       # start latitude in [deg]
+start_lon = 0.0                        # start longitude in [deg]
+start_utc = '2020-12-13 12:00:00.000'  # start date and time in UTC
+p_0 = 1013.25  # sea-level pressure